JP6326304B2 - Grommet mounting structure - Google Patents

Description

  The present invention relates to a grommet mounting structure, and more particularly to a grommet mounting structure used when a wire harness is assembled by penetrating a panel of an automobile or the like.

The grommet is attached to a panel of an automobile or the like via a bracket. The grommet is generally formed with an annular groove over the entire circumference, and is held by the bracket by fitting the annular groove into a hole of the bracket, and a seal is achieved at the portion (see Patent Document 1). ).
As shown in FIG. 4, the conventional grommet mounting structure includes an annular groove 113 formed between the small-diameter flange portion 11 and the large-diameter flange portion 12 of the grommet 110 fused to the wire harness 100. This was done by fitting the peripheral edge of the central hole.
Therefore, the seal between the grommet 110 and the bracket 120 includes (a) a seal S1 between the side surface of the annular groove 113 of the grommet 110 and the side surface of the central hole of the bracket 120, and (b) the upper side surface of the annular groove 113 of the grommet 110 and the bracket 120. As can be seen from the seal S2 near the upper part of the central hole, and (c) the seal S3 between the lower side surface of the annular groove 113 of the grommet 110 and the lower part of the central hole of the bracket 120, it is held at one place as a fitting part. It has a function and a sealing function. As described above, the holding force and the sealing performance are ensured at one place, so that the insertion force is high.
Furthermore, the holding and sealing properties of the grommet 110 and the bracket 120 depend on the product, and are unstable.

Japanese Utility Model Publication No. 6-72127

  The present invention has been made in view of the above circumstances, and has a grommet mounting structure that can reduce the insertion force when the grommet is assembled to the bracket, and can secure the holding force and sealing performance of the grommet. The purpose is to provide.

In order to achieve the above object, the grommet mounting structures (1) to (3) according to the present invention are characterized by the following.
(1) The hole of the bracket having a hole with the annular groove of the grommet having a small-diameter flange part and a large-diameter flange part from one end and defining an annular groove between the small-diameter flange part and the large-diameter flange part. In the grommet mounting structure that locks the grommet to the bracket by fitting it to the periphery of
A rib member having a peripheral surface of the grommet and a surface contacting the surface of the bracket
After the annular groove of the grommet is fitted in the hole of the bracket, the rib member is adhered to the surface of the bracket to hold the grommet on the bracket.

(2) In the grommet mounting structure (1), the bracket and the rib member are made of an elastomer.
(3) In the grommet mounting structure (1) or (2), the rib member is provided with an adhesive piece projecting in a vertical direction at a portion in contact with the bracket.

  According to the grommet mounting structure (1), the grommet is securely held by the bracket by the rib member. Therefore, it is not necessary to deepen the annular groove of the grommet fitted into the hole of the bracket, that is, it is not necessary to increase the diameter of the flange that defines the annular groove, so that the grommet can be easily attached to the bracket. .

  According to the grommet mounting structure (2), since the rib member can be fused to the bracket, workability is improved.

  According to the grommet mounting structure (3), since the mounting surface of the rib member to the bracket becomes large, the rib member can be easily and securely mounted to the bracket.

It is the disassembled perspective view which showed the attachment structure of the grommet which concerns on this invention. It is a section perspective view showing the state where a grommet was attached to a bracket. It is sectional drawing which expanded and showed the latching | locking part of the grommet. It is sectional drawing which expanded and showed the latching | locking part of the conventional grommet.

  Hereinafter, an embodiment of a grommet mounting structure according to the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the grommet mounting structure includes a molded grommet 10 made of rubber, elastomer, or the like, to which the wire harness 1 is fused, a bracket 20 that holds the grommet, and a rib member 30 that holds the grommet 10 on the bracket 20. It has. The wire harness 1 is held on a panel 40 such as a vehicle via the grommet 10 and the bracket 20.

  The grommet 10 includes a small-diameter flange portion 11 and a large-diameter flange portion 12, and an annular groove 13 is formed between the flange portions 11 and 12. Then, the cylindrical end portion 14 is formed by a conical inclined surface 15 from the upper end outer peripheral edge of the small diameter flange portion 11, and a cylindrical end portion 16 projects from the lower surface of the large diameter flange portion 12.

  The bracket 20 has a disk-shaped main portion 21 and a mounting portion 22 formed on the outer side in the diameter direction thereof. The main portion 21 is formed with a hole 21a for receiving the cylindrical end portion 17 of the grommet 10 at the center, and the attachment portion 22 is formed with a hole 22a through which a connector such as a bolt fastened to the panel 40 is inserted. Has been. An annular packing 23 is provided on the back surface of the bracket 20. This packing 23 seals the periphery of the hole of the panel 40 mentioned later.

  The rib member 30 is a component adopted by the present invention. One end surface 31 of the rib member 30 is formed following the side surface of the grommet 10, that is, the cylindrical end portion 14, the conical inclined surface 15, and the small-diameter flange portion 11, and the upper surface 32 is inclined toward the other end 33. ing. In addition, the rib member 30 includes an adhesive piece 34 projecting vertically in the lower portion.

  A panel 40 such as a vehicle body is formed with a hole 41 for receiving the end portion 16 of the grommet 10 attached to the bracket 20 and a hole 42 for inserting a connector such as a bolt for fastening the bracket 20.

Each member constituted in this way is assembled as follows.
The grommet 10 to which the wire harness 1 is fused is inserted into the hole 21a of the bracket 20 with the cylindrical end portion 14 at the head. Accordingly, the conical slope 15 of the grommet 10 and then the small-diameter flange portion 11 are compressed and pass through the hole 21 a of the bracket 20.

  In this way, the grommet 10 attached to the bracket 20 has the circumferential surface of the hole 21a of the bracket 20 firmly in contact with the side surface of the annular groove 13, and the sealing performance S1 is ensured.

  Next, one end surface 31 of the rib member 30 is brought into contact with the side surface of the grommet 10, and the adhesive piece 34 is bonded to the upper surface of the bracket 20.

  Next, the bracket 20 is overlapped with the panel 40 such as the vehicle body, and a fastener such as a bolt is inserted into the hole 22a of the bracket 20 and the hole 42 of the panel 40, and both are fastened. At that time, the large-diameter flange portion 12 and the cylindrical end portion 16 of the grommet 10 are accommodated in the hole 41 of the panel 40. In addition, the packing 23 of the bracket 20 abuts against the panel 40 and seals between them.

Thus, the grommet 10 attached to the panel 40 is prevented from being detached from the bracket 20 by the small diameter flange portion 11 and the large diameter flange portion 12. In particular, since the grommet 10 needs to insert the small diameter flange portion 11 through the hole 21a of the bracket 20, the diameter of the small diameter flange portion 11 is formed small. Therefore, in this embodiment, as shown in FIG. 3, since the holding of the grommet 10 and the bracket 20 is ensured exclusively by the rib member 30, only the sealing property between the grommet 10 and the bracket 20 is guaranteed by this fitting portion. That's fine.
Therefore, since clearances C1 and C2 may be present between the grommet 10 and the bracket 20, the attaching operation of the grommet 10 to the bracket 20 is facilitated.

  In the above embodiment, the rib member 30 is disposed on the upper surface of the bracket 20. However, the rib member 30 may be disposed on the lower surface of the bracket 20. In this case, the lower flange portion of the grommet 10 is held by the bracket 20.

<Summary>
Here, the features of the grommet mounting structure according to the present invention described above are briefly summarized in the following items i to iii.
[I] A small-diameter flange portion (11) and a large-diameter flange portion (12) are provided from one end, and an annular groove (13) is defined between the small-diameter flange portion (11) and the large-diameter flange portion (12). In the grommet mounting structure for engaging the grommet with the bracket by fitting the annular groove of the grommet (10) to the periphery of the hole of the bracket (20) having the hole (20a),
A rib member (30) having a peripheral surface of the grommet and a surface contacting the surface of the bracket;
A grommet mounting structure characterized in that after the annular groove of the grommet is fitted into the hole of the bracket, the rib member is adhered to the surface of the bracket to hold the grommet on the bracket.
[Ii] The grommet mounting structure described in i above, wherein the bracket and the rib member are made of an elastomer.
[Iii] The grommet mounting structure according to the above i or ii, wherein the rib member is provided with an adhesive piece projecting in a vertical direction at a portion in contact with the bracket.

  According to the grommet mounting structure i, the grommet is securely held by the bracket by the rib member. Therefore, it is not necessary to deepen the annular groove of the grommet fitted into the hole of the bracket, that is, it is not necessary to increase the diameter of the flange that defines the annular groove, so that the grommet can be easily attached to the bracket. .

  According to the grommet mounting structure ii, the rib member can be fused to the bracket, so that workability is improved.

  According to the above-described grommet mounting structure iii, since the mounting surface of the rib member to the bracket becomes large, the rib member can be easily and securely mounted to the bracket.

DESCRIPTION OF SYMBOLS 1 Wire harness 10 Grommet 11 Small diameter flange part 12 Large diameter flange part 13 Annular groove 14 Cylindrical end part 15 Conical slope 16 Cylindrical end part 20 Bracket 21 Main part 21a Hole 22 Attachment part 30 Rib member 31 One end surface 32 Upper surface 33 Other end 34 Adhesive piece 40 Panel 41, 42

Claims (3)

The annular groove of the grommet having a small-diameter flange portion and a large-diameter flange portion from one end portion and defining an annular groove between the small-diameter flange portion and the large-diameter flange portion is formed on the periphery of the hole of the bracket having a hole. In the grommet mounting structure that locks the grommet to the bracket by fitting,
A rib member having a peripheral surface of the grommet and a surface contacting the surface of the bracket
A grommet mounting structure characterized in that after the annular groove of the grommet is fitted into the hole of the bracket, the rib member is adhered to the surface of the bracket to hold the grommet on the bracket.     2. The grommet mounting structure according to claim 1, wherein the bracket and the rib member are made of an elastomer.   The grommet mounting structure according to claim 1 or 2, wherein the rib member includes an adhesive piece projecting in a vertical direction at a portion in contact with the bracket.

Images